I had a browse through other posts and I've seen this problem come up quite often. I am on my sisters computer at the moment, mine is unusuable. When I startup my PC it goes straight to the options screen (start windows normally/safe mode/last known good configuration - you know the one) None of these options work. The PC just crashes half way loading any of them and flashes a BSOD mentioning a "BAD_POOL_HEADER". I cannot get onto safe mode. I can enter the advanced options screen by hitting F8 but sadly it just reboots again if I try any of these options. I have a Windows XP repair disk. I changed the BIOS booting order, so I was luckily able to access this disk. I followed instructions on a Windows repair, and hit enter to continue (not R), I thought this would work, but instead of going to the next stage on the repair, it reverted back to the BSOD bad_pool_header screen and just got stuck there. My PC is an Advent PC. I tried the recovery disk and the same thing happened.. only the BSOD said "page_fault_in_nonpaged_area" this time. I really do not know what on earth is going on, any suggestions at all would be appriciated so so much, because I really do need to get my computer fixed. Thankyou in advance.